How do you say aboriginal in aboriginal?

If you are talking about aboriginal languages of Australia, you will need to be more specific. There are more than 200 different aboriginal languages.

There are many Aboriginal languages. It depends which one you are trying to speak!

With over 120 viable aboriginal languages/dialects, you would have to specify which region you wished to represent. For example, the Noongar equivalent is "Kaya". The Arrente of Central Australia say...

"Torouk moui" is the aboriginal translation for "transform". Australian Aborigines do not have a word for "transform".

Given that there are hundreds of Aboriginal dialects in Australia, there is no single answer to this question.